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D5337-23 – Standard Test Method Technical Guide
🎯 Scope and Applicability of D5337-23
ASTM D5337-23 establishes a standardized practice for setting and verifying the flow rate of personal sampling pumps. These pumps are commonly used for monitoring personal airborne exposures in the workplace. The practice details procedures for using working standard flow meters that are traceable to national or international standards, as well as those that are not, with a clear preference for traceable instruments.
This standard specifies that the values stated in SI units are to be regarded as standard. Users are reminded that the standard does not purport to address all safety concerns, and it is the responsibility of the user to establish appropriate safety, health, and environmental practices prior to use.
⚠️ User Responsibility: D5337-23 places the responsibility on the user to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
⚙️ Key Definitions and Traceability Standards
The concept of “traceability” is central to this standard, defined as the property of a measurement result whereby the result can be related to a reference through a documented unbroken chain of calibrations. D5337-23 integrates a framework of referenced standards to ensure comprehensive quality control in air sampling.
| 🟦 Standard / Document | 📏 Scope and Relevance |
|---|---|
| ASTM D1356 | Terminology Relating to Sampling and Analysis of Atmospheres |
| ASTM D4532 | Test Method for Respirable Dust in Workplace Atmospheres Using Cyclone Samplers |
| ISO 13137 | Workplace atmospheres – Pumps for personal sampling of chemical and biological agents |
| ISO/IEC 17025 | General requirements for the competence of testing and calibration laboratories |
| ISO/IEC 17011 | Requirements for accreditation bodies accrediting conformity assessment bodies |
The standard also references operational methodologies from regulatory bodies, including the NIOSH Manual of Analytical Methods (NMAM 0600), the OSHA Analytical Methods Manual, and the OSHA Technical Manual (OTM), bridging specific analytical methods with general flow rate verification practices.
📊 Recommended Procedures for Flow Rate Verification
The core practice involves setting the pump flow rate prior to sampling and verifying it after sampling using a working standard flow meter. Using a traceable standard is the preferred method for ensuring the highest level of accuracy for the air volume sampled.
💡 Industry Best Practice: Always use a primary or secondary standard flow meter that is traceable to a national or international standard (e.g., calibrated under ISO/IEC 17025) for setting and verifying personal sampling pump flow rates. This ensures data defensibility and compliance with ASTM D5337-23.
For specific applications, such as respirable dust sampling using cyclones, the flow rate must be set according to the manufacturer’s specifications and verified using the procedures in this standard, aligning with ASTM D4532 and NIOSH Method 0600.
| 🎯 Procedure Step | ⚡ Description | 📐 Preferred Equipment |
|---|---|---|
| Flow Rate Setting | Adjust pump to target flow rate | Traceable working standard flow meter |
| Pre-Sampling Verification | Confirm flow rate is stable and within tolerance | Primary or secondary standard meter |
| Post-Sampling Check | Measure final flow rate to calculate sampled volume | Same standard meter used for setup |
❓ Frequently Asked Questions
🔍 What is the main objective of ASTM D5337-23?
ASTM D5337-23 provides a standard practice for the setting and verification of flow rates of personal sampling pumps used for monitoring personal airborne exposures in the workplace. This ensures accurate and consistent air volume measurement.
💡 Are traceable flow meters required by D5337-23?
While the practice includes procedures for using working standard flow meters that are traceable to national standards as well as those that are not, traceable standards are strongly preferred for ensuring the accuracy and defensibility of sampling data.
⚡ What are the required units of measurement in this standard?
The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
📌 Which regulatory documents are referenced in D5337-23?
The standard references the NIOSH Manual of Analytical Methods (NMAM 0600), the OSHA Analytical Methods Manual, and the OSHA Technical Manual (OTM), linking the flow rate practice directly to established industrial hygiene sampling methodologies.